What is the difference between schedule 40 and 80 pipe

For these reasons, it is important to also reference a pipe schedule table to ensure that the proper pipe size is being selected. We are metal experts and have been providing quality customer service and products since At Metal Supermarkets, we supply a wide range of metals for a variety of applications. Our stock includes: mild steel, stainless steel, aluminum, tool steel, alloy steel, brass, bronze and copper. We stock a wide range of shapes including: bars, tubes, sheets, plates and more.

And we can cut metal to your exact specifications. CIS offers schedule 40 and schedule 80 PVC piping as well as fittings and other accessories at extremely competitive prices. Below are some downloadable reference sheets that give you more information about the different dimensions and pressure ratings for Schedule 40 PVC and Schedule 80 PVC:. Both schedule 40 and 80 PVC are used widely around the world.

Each one has its benefits in different applications. Schedule 40 pipe has thinner walls, so it is best for applications involving relatively low water pressure. Schedule 80 pipe has thicker walls and is able to withstand higher PSI pounds per square inch. This makes it ideal for industrial and chemical applications. As mentioned earlier, both schedule 80 and schedule 40 PVC pipe have the exact same outside diameter. This means schedule 80 pipe will have a slightly more restricted flow — even though it may be the same pipe diameter as an equivalent schedule 40 pipe.

This means schedule 40 and 80 pipe do fit together and can be used together if necessary. The only thing to be careful of is that the lower pressure handling schedule 40 parts meet the pressure requirements of your application.

Your pipe line is only as strong as your weakest part or joint, so even one schedule 40 part used in a higher pressure schedule 80 line can cause severe damage. Generally, schedule 40 pipe is white in color, while schedule 80 is often gray to distinguish it from PVC is available in many colors though, so be sure to check labels when purchasing.

The exact wall thickness value requirements will differ on the specific pipe schedule intended and the plumbing's desired total width diameter. By definition, as pipe schedule values increase, e. This in turn indicates Schedule 80 pipe will always have thicker sidewalls when compared to Schedule 40 pipe, when used for a specified pipe size diameter and material.

The increased wall thickness between schedules occurs as a reduction in the Inner Diameter measurement. Pipe scheduling is used by contractors, construction and engineering firms as well as general plumbing handlers, installers and DIY do it yourself builders. In simpler words, pipe scheduling is used to determine the plumbing equipment that is right for the job. In plumbing scenarios, it is important to compare and understand required pipe thickness, pressure ratings, chemical suitability and total costs, all of which are factors associated with and differ between pipe scheduling ratings.

Rather, plumbing applications are extremely specific, especially those involving chemicals, and what is the best choice -- Schedule 40 or Schedule 80 -- will be an educated decision that considers the full variables of the pipe's intended use.

If Sch 40 is acceptably rated for the operational conditions of the scenario, one can save both piping material and associated costs by choosing to use Schedule 40 over Schedule 80 plumbing.

The following property table overviews and compares Schedule 40 and Schedule 80 for its thickness, size, and maximum working pressure for fluids. Consider this chart and pressure ratings for pipe sizes whenever wanting to determine the compatibility of the pipe schedule for an application. If seeking to understand pipe scheduling, especially for PVC and CPVC, our article above hopefully shed some light on the definition, key differences, and usage considerations for both Schedule 40 and Schedule If not, maybe read it again.

Otherwise, feel free to reach out to us with any and all questions, comments or needs. Typically this is listed in pounds per square inch or PSI. You can find schedule 80 pipe used most often in heavy duty commercial and industrial applications. Pipe manufacturers usually make it gray just to differentiate it from standard schedule 40 PVC though you should always check the manufacturer markings on the pipe to be sure. If the pipe were the same color, it would be difficult to tell the difference from the outside.

In fact, both schedule 40 and schedule 80 PVC pipe have the same outside diameters. So a 1" size sch 40 PVC pipe has the same O. The difference is in the inside diameter or I. Schedule 80 PVC pipe will have a smaller inside area than Schedule 40 pipe because of its thicker wall. For that reason, flow is more restricted in Schedule 80 pipe vs Schedule 40 of the same size. The same is true of PVC fittings in both schedules. Two other factors that may play into which schedule PVC you choose are weight and price.

Since schedule 80 PVC has a thicker wall, it is heavier than comparable schedule 40 pipe and fittings. That generally makes it more pricey to ship and more difficult to handle when installing large size pipe and fittings. Schedule 80 PVC is also more expensive than schedule 40 because it requires more PVC material and has to withstand higher pressures.